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nvme-fabrics: allow user to pass in nr_poll_queues

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This argument will specify how many polling I/O queues to connect when
creating the controller. These I/O queues will host I/O that is set with
REQ_HIPRI.

Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2018-12-14 11:06:09 -08:00 committed by Christoph Hellwig
parent 26c682274e
commit 89d43802b0
2 changed files with 16 additions and 0 deletions
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13
drivers/nvme/host/fabrics.c
View file

@ -617,6 +617,7 @@ static const match_table_t opt_tokens = {
{ NVMF_OPT_HDR_DIGEST, "hdr_digest" },
{ NVMF_OPT_DATA_DIGEST, "data_digest" },
{ NVMF_OPT_NR_WRITE_QUEUES, "nr_write_queues=%d" },
{ NVMF_OPT_NR_POLL_QUEUES, "nr_poll_queues=%d" },
{ NVMF_OPT_ERR, NULL }
};
@ -850,6 +851,18 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts,
}
opts->nr_write_queues = token;
break;
case NVMF_OPT_NR_POLL_QUEUES:
if (match_int(args, &token)) {
ret = -EINVAL;
goto out;
}
if (token <= 0) {
pr_err("Invalid nr_poll_queues %d\n", token);
ret = -EINVAL;
goto out;
}
opts->nr_poll_queues = token;
break;
default:
pr_warn("unknown parameter or missing value '%s' in ctrl creation request\n",
p);

3
drivers/nvme/host/fabrics.h
View file

@ -62,6 +62,7 @@ enum {
NVMF_OPT_HDR_DIGEST = 1 << 15,
NVMF_OPT_DATA_DIGEST = 1 << 16,
NVMF_OPT_NR_WRITE_QUEUES = 1 << 17,
NVMF_OPT_NR_POLL_QUEUES = 1 << 18,
};
/**
@ -93,6 +94,7 @@ enum {
* @hdr_digest: generate/verify header digest (TCP)
* @data_digest: generate/verify data digest (TCP)
* @nr_write_queues: number of queues for write I/O
* @nr_poll_queues: number of queues for polling I/O
*/
struct nvmf_ctrl_options {
unsigned mask;
@ -113,6 +115,7 @@ struct nvmf_ctrl_options {
bool hdr_digest;
bool data_digest;
unsigned int nr_write_queues;
unsigned int nr_poll_queues;
};
/*